Improvement in lathes for turning pen-handles



UNITED STATES PATENT FFICE JOHN KEITH, OF WORCESTER, MASSACHUSETTS.

IMPROVEMENT IN LA'THES FOR TURNING`PEN-HANDLES.

Specification forming part of Letters Patent N0. 59,407, dated November 6, 1866.

To all whom t may concern:

Be it known that I, JOHN KEITH, of the city and county of Worcester, and State of Massachusetts, have invented certain new and useful Improvements in Machines for Turning Pen-Handles, and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1, Sheet l, represents a perspective view of my improved machine. Fig. 2, Sheet 2, represents a longitudinal central section on line A B, Fig. 3. Fig. 3 represents a top or plan view, and Fig. 4 represents a cross-section on line B C, Fig. 3, looking in the direction of arrow l.

In the drawings, A represents the table, to which is fastened a tongue or dovetail piece, B, which fits into the slide-piece C, upon which is fastened the standard D, to the top of which is fastened the tool-rest E. A sliding piece, F, is fitted to slide back and forth in a groove in piece E. Slide-piece F can be thrown back by means of lever a, which is attached to a short shaft, b, passing through the side of F, and securely fastened to a cam, c, which works in a notch cut in the side of piece F. Two plates, d d, are fitted to the top of piece E to keep slide-piece F in place.

G is a rod, one end of which rests in a groove iu the top of standard D, while the other end passes through a thumb-nut, Gr', having a groove, c, which ts into and rests in a slot in a stand, H, fastened to the rear of piece E. From the front end of rod G rises a pin, f, which passes through a hole in cutter g, which works under guide I, and through a slotcut in collar J. (See dotted lines, Fig. 3.) A screw, h, passes down through the top of guide I, for the purpose of regulating the play of cutter g.

K is another rod, resting in a groove in slidepiece F, the rear end of which passes through a thumb-nut, K', having a groove, e', which fits into a slotted stand, H', fastened to the rear of slide-piece F. A pin, t', in the front of rod K, passes up through ahole in cutterL, which works under guide L', through the top of which passes a screw, lc, to regulate the play of cutter L. Guide-piece L' is fastened to and slides with piece F.

M is a pattern, hinged at l to a plate fastened to the stand M'. The pattern M extends forward and rests upon the flange m of frictionpulley m', which turns upon screw u, which enters the piece F. A screw, a', passes through a friction-pulley, m", similar to m', into the slide-piece F, a long slot being cut in the piece E, to permit screw a' to play back and forth when piece F is operated by lever c, as before stated. A spiral spring, N, is fastened at o to piece E, and at t' to a screw which enters the slide-piece F through a long slot in piece E, whereby piece F is drawn forward, so that the friction roll or pulley m" is forced against the pattern-plate M at all times, unless piece F is forced backby lever a, in which case roll m" is removed from contact with the edge of pattern M.

Collar J, which may be formed or cast in one piece with stand D, or made separately and fastened thereto, is countersunk or grooved out, as seen at y, and has a round hole, through which the pen-handle wood passes, as seen at s. To the side of collar J is fastened a hollow stand, P, in which works the saw t, which is made from a rod, u, flattened and notched at the bottom, and having a pin, r, against which a spiral spring, w, presses, the lower end of which rests upon the shoulder m in stand P, as fully shown in the drawings. Stand P has fastened to its top a cap-piece, P', while the saw-rod a is provided at the top with a knob, y.

S is a section of the spindle, which turns in suitable bearings in stand M', and to which power is applied, in the usual manner, by belt and pulley to the end T. The inner end of the spindle S is made with asquare socket for the reception of one end of the pen-handle wood, which is first sawed into square pieces of the size of the socket, and of sufficient length to form a pen-handle. 4 v

The cutters g and L can be adjusted by turning the thumb-nuts G' and K', and then fastened by turning down the set-screws 7L and k, while they can be quickly removed for grinding by turning up screws' h and lc, and then slipping the cutters up off of the pins f and i. When lever a is turned forward it rests on pin 4, and on pin 5 when turned back.

The operation is as follows The parts G, D, and E, together with their permanent connections, are run out so that the point 2 of pattern M will be clasped between the friction rolls or pulleys m' m". Oneend of a block of pen-handle wood is now placed in the socket in spindle S, while the other end is placed in the concave side i/ of collar J, and motion is imparted to spindle S, which causes the block of wood to revolve with great rapidity; and as the parts G, D, and E, with their connections, are moved toward the spindle S, cutter g reduces theblock to the size of hole s, through which the rounded end passes, and in which it is supported, while cutter L reduces theblock as fast as it passes through to the desired form of a pen-handle, as indicated in the drawings at o. Piece F, which supports cutter L, is moved back from the block of wood by the uneven edge of the pattern M, while spring N causes it to return again toits former position. When a pen-handle has been turned, the operator depresses rod it, andthe turned handle is severed by saw t. A,

In the drawings a iinished handle is represented as partiallyr cut oif. As soon as a handle has been cut o, lever et is drawn back, thereby causing cam c to force back piece F, cutter L, and friction -pulley m", attached thereto, which enables slide-piece C and the parts connected therewith to be run back to receive another block. By withdrawing friction-roll m" from the edge of pattern M, as above described, much friction is avoided in the ruiming back of slide C, since slide-piece F does not have to conform to the uneven edge of pattern M. Slide-frame C may be connected to a screw-feed, so as to be operated by power when moving up to turn the handle, iu any of the well-known modes.

Having described my improved machine for turning pen-handles, what I claim therein as new and of my invention, and desire to secure by Letters Patent, is

l. The combination, with slide-piece C, standardv D, tool-rest piece E, and slide-piece F, of the adjustable cutters g and L and collar J, arranged for joint operation substantially as set forth.

2. The combination and relative arrangement of concaved `collar J and cutters g and L, as and for the purposes set forth.

3. The combination and arrangement of saw t with collar J and cutters f/ and L, as and for the purposes set forth.

4. The combination, with tool-rest piece E and slide-piece F, of spring N, pattern M, and friction rolls or pulleys m and m", with their flanges on, as and for the purposes set forth.

5. The combination of lever a, shaft b, and cam c with the pieces E and F, as and for the purposes set forth. i

6. The combination and arrangement of rods G and K, provided with pins or hooksf and t' upon their ends, and thumb-nuts G' and K', with slotted stands H H', cutters g and L. guides I L', and set-screws h and lc, as and for the purposes set forth.

JOHN KEITH. Witnesses:

H. L. FULLER, Trios. H. DODGE. 

